Grand Challenge downtown, Sparter frees your game $, Visto revisited…

Defense Department’s Grand Challenge moves downtown — The great annual race of robotic cars, until this year held in the desert, is moving downtown. The DARPA-sponsored event awards the winner $2 million. Unmanned vehicles will attempt to avoid people and buildings instead of boulders and sagebrush, with no remote control or other human interference. (See Merc story here.) The goal is to help the Defense Department fulfill a Congressional mandate: that one-third of combat vehicles be unmanned by 2015. Guess this is a sign of the times: While the U.S. military rolled through the Iraqi desert with no problem, managing street warfare is more of a challenge. Meanwhile, a Jon Feiber, a venture capitalist sponsoring one of the competition’s entrants, suggests the project could help with traffic congestion. Another possible payback my be fuel efficiencey, if cars are pacing themselves at optimal distances from each other, and at optimal speeds.

Speaking of traffic, look at Wikipedia‘s — Google traffic going to Wikipedia is exploding, with Wikipedia now the No. 3 website in Google’s downstream, after Google Image Search and MySpace, according to HitWise. That’s phenomenal, for a non-profit company that has less than ten full-time employees (Ars Technica has good summary. It’s costly, too. Wikipedia’s bandwidth this year is expected to cost up to $100,000 a month, and it’s running more than 350 servers. With annual costs at about $5 million a year, but incoming donations at barely $1 million, something might crack soon — the company says it only has three to four months of cash left. Put two and two together: If Wikipedia’s getting that much traffic, all is has to do is put up a few Google ads. If anything, Google will look more favorably at sending even more searchers over to Wikipedia — and monetizing the site would be easy. We don’t know founder Jimmy Wales’ personal motives, but publicly at least, he’s proclaiming he doesn’t want to let ads onto the site.

For the green tech fans — William Hudson writes an engaging piece about the challenges faced by ethanol and other forms of alternative energy. He concludes with what we all should know, i.e., that the sun is where the magic is. Future breakthroughs will be around how we harness its immense power. That’s why investor Vinod Khosla is pitching the benefits of solar lately, and this goes beyond the solar panels we traditionally associate with solar.

Sparter, offers virtual currency trading — While auction giant eBay decided to ban sales of virtual property, there’s a new company, called Sparter, that is stepping in to let gamers trade virtual currency. The company has received venture capital funding from Bessemer Venture Partner, and while it wants to work with IGE, a service that lets gamers trade in their virtual currencies for one game in exchange for another, Sparter apparently wants to also let you bypass IGE, letting you trade directly with other gamers. (Via Virtual Economies.)